Thanks Florian, that is helpful. It’s good to know I’m not the first to grapple with this.
Add servers to the mdn-browser-compat-data project
We’d also have to rename it mdn-browser-and-server-compat-data. No, I agree that 3 or 4 are the better options. I’m also not sure which is best between those two.
Of course there are headers, like CSP, where “browser support” does mean something.